题目内容

The bank keeps on introducing innovations into the market.

A. 对
B. 错

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The bank has won many awards.

A. 对
B. 错

The bank plans to grow business in other places.

A. 对
B. 错

间接碘量法测定铜盐中铜含量实验中,若过早加入淀粉指示剂将导致结果( )。

A. 偏高
B. 偏低
C. 无影响
D. 无法判断

碘量法中用的指示剂为( )

A. Na2WO4
B. 淀粉
C. 二苯胺磺酸钠
D. 二甲酚橙

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